South Portland · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
South Portland & neighbors — hit play
Every city on the map carries real forecast data from the same models as its city page, refreshed several times a day. The icon is the day's overall look; the number is the afternoon high.
Next 14 days at a glance
from the model forecast
Hottest day
75°
Tue, Sep 8
Coldest night
56°
Sun, Sep 6
Days with precip
6 / 14
of 14 forecast days
Nicest day
Mon, Sep 7
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
66° 56°
70% precip chance
Sat 12 – Sun 13 Sep
64° 59°
17% precip chance
Sat 19 – Sun 20 Sep
68° 59°
typical range
Sat 26 – Sun 27 Sep
68° 59°
typical range
30 days — South Portland
14 forecast + 16 climatology
Wed · Today Fog
63°60°0.1 mm⌄
Wind11 mph E
Gusts18 mph
UV index6 – Moderate
Precip chance44%
Sunrise06:05
Sunset19:15
Thu · Tomorrow Showers
67°61°18.0 mm⌄
Wind15 mph SE
Gusts22 mph
UV index3 – Low
Precip chance92%
Sunrise06:07
Sunset19:13
Friday 4/9 Sunny
72°61°0.8 mm⌄
Wind10 mph SE
Gusts20 mph
UV index6 – High
Precip chance54%
Sunrise06:08
Sunset19:11
Saturday 5/9 Sunny
63°58°2.0 mm⌄
Wind14 mph N
Gusts27 mph
UV index2 – Low
Precip chance70%
Sunrise06:09
Sunset19:10
Sunday 6/9 Mostly cloudy
66°56°10%⌄
Wind17 mph N
Gusts28 mph
UV index5 – Moderate
Precip chance10%
Sunrise06:10
Sunset19:08
Monday 7/9 Sunny
69°57°5%⌄
Wind10 mph N
Gusts21 mph
UV index6 – High
Precip chance5%
Sunrise06:11
Sunset19:06
Tuesday 8/9 Mostly cloudy
75°63°15%⌄
Wind10 mph SW
Gusts17 mph
UV index5 – Moderate
Precip chance15%
Sunrise06:12
Sunset19:04
Wednesday 9/9 Sunny
65°61°13%⌄
Wind10 mph E
Gusts18 mph
UV index5 – Moderate
Precip chance13%
Sunrise06:13
Sunset19:02
Thursday 10/9 Showers
63°61°3.1 mm⌄
Wind23 mph S
Gusts32 mph
UV index4 – Moderate
Precip chance84%
Sunrise06:14
Sunset19:01
Friday 11/9 Showers
67°62°1.1 mm⌄
Wind15 mph N
Gusts26 mph
UV index4 – Moderate
Precip chance69%
Sunrise06:15
Sunset18:59
Saturday 12/9 Mostly cloudy
62°60°15%⌄
Wind15 mph N
Gusts25 mph
UV index5 – Moderate
Precip chance15%
Sunrise06:17
Sunset18:57
Sunday 13/9 Mostly cloudy
64°59°17%⌄
Wind13 mph S
Gusts23 mph
UV index5 – Moderate
Precip chance17%
Sunrise06:18
Sunset18:55
Monday 14/9 Mostly cloudy
66°62°2.2 mm⌄
Wind18 mph S
Gusts36 mph
UV index5 – Moderate
Precip chance72%
Sunrise06:19
Sunset18:53
Tuesday 15/9 Mostly cloudy
68°64°4.1 mm⌄
Wind17 mph S
Gusts28 mph
UV index5 – Moderate
Precip chance87%
Sunrise06:20
Sunset18:51
Wednesday 16/9 Rain (climatological)
67°61°8.2 mm⌄
Day≈62–72°
Night≈55–66°
Precip≈2.7 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
69°62°20%⌄
Day≈64–74°
Night≈56–67°
Precip≈2.7 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
69°62°20%⌄
Day≈64–74°
Night≈56–67°
Precip≈2.7 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Rain (climatological)
68°61°5.7 mm⌄
Day≈63–73°
Night≈56–67°
Precip≈2.7 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
64°59°20%⌄
Day≈58–69°
Night≈53–64°
Precip≈2.7 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
60°56°20%⌄
Day≈55–65°
Night≈51–62°
Precip≈2.7 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Rain (climatological)
65°60°7.3 mm⌄
Day≈60–71°
Night≈54–65°
Precip≈2.7 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
65°59°20%⌄
Day≈59–70°
Night≈54–65°
Precip≈2.7 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
69°62°20%⌄
Day≈64–74°
Night≈56–67°
Precip≈2.7 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Rain (climatological)
72°64°5.7 mm⌄
Day≈66–77°
Night≈58–69°
Precip≈2.7 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Partly cloudy (climatological)
68°61°20%⌄
Day≈63–73°
Night≈56–67°
Precip≈2.7 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Partly cloudy (climatological)
64°59°20%⌄
Day≈59–69°
Night≈53–64°
Precip≈2.7 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Rain (climatological)
60°56°5.4 mm⌄
Day≈55–65°
Night≈51–62°
Precip≈2.7 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Partly cloudy (climatological)
65°60°20%⌄
Day≈60–71°
Night≈54–65°
Precip≈2.7 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Partly cloudy (climatological)
66°60°20%⌄
Day≈61–72°
Night≈55–66°
Precip≈2.7 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 1/10 Rain (climatological)
55°49°3.6 mm⌄
Day≈49–60°
Night≈43–54°
Precip≈2.7 in / October
(climatological)Typical range for these dates · 1991–2020
How does a 30-day outlook work?
The first 14 days are a live model forecast. The back half of the month shows the typical range for those dates — useful for planning, not a literal prediction.
First 14 days: a real forecast, blended from NBM, ECMWF and GFS runs. Trust it most inside three days; by the second week treat it as a lean, not a promise.
Rest of the month: past day 14 we stop pretending to forecast and switch to the climate corridor — the range those dates have produced over three decades computed directly for South Portland, with mild week-to-week wiggle.
Good question for this page: "Is late August usually humid in Chicago?" Bad question: "Do I need an umbrella on the 29th?" — three weeks out no one knows, and that's the honest answer.